The deduced amino acid sequence of Dgrca (Dg) is conserved with respect to Rubisco activase coding sequences from other photosynthetic species, including apple (Md, P[N] = 1.8e−259; Watillon et al., 1993), Arabidopsis small peptide (At, P[N] = 5.8e−247; Orozco et al., 1993), and tobacco small peptide (Nt, P[N] = 4.8e−240; accession no. U35111).